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Endangered species
Plant or animal species reduced to such low numbers of individuals that they are at risk of becoming extinct.
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Results 1 - 13 of 13 listed by similarity [list alphabetically]
Biological resource status and trends: Threatened and endangered species [New Window]
Information concerning status and trends of biological resources, focusing on threatened and endangered species
PDF Buck Island Reef National Monument Sea Turtle Research Program: Sea turtle nesting research & monitoring protocols manual [New Window]
Manual for research program on the nesting habits of sea turtles of the Virgin Islands, with descriptions of species, nesting behavior, observation methods, record keeping, tagging, and tissue sample collection. (PDF file, 121 pp.)
Burrowing owl winter ecology and use of artificial burrows in South Texas [New Window]
Experimental use of artificial burrows in south Texas to help in conservation of the migratory burrowing owls (Athene cunicularia) that breed in dry grasslands using animal burrows.
Desert tortoise research at Western Ecological Research Center (WERC) [New Window]
Links to research studies, conservation information, and general information on desert tortoises at the Western Ecological Research Center in Sacramento, California.
Genetics and molecular tools [New Window]
Describes the value of molecular biology genetic tools in enhancing the delineation of the genetic diversity and the effects of environmental degradation on living species. Links to research, which differentiated two species of sage-grouse.
Geospatial technology activities at Columbia Environmental Research Center (CERC) [New Window]
Short descriptions and links to further information on projects using digital image processing, remote sensing, GIS and GPS technologies at the Columbia Environmental Research Center (CERC) in Missouri for biology and geomorphology research.
Hydrologic studies in the Upper Klamath Basin, Oregon [New Window]
Overview of Klamath ecological research and links to USGS Klamath studies on ground water, nutrients, sediment oxygen demand, and fish response to water quality, sucker ecology, publications, bibliographies, and data.
Northern Divide Grizzly Bear Project [New Window]
Project to assess the grizzly bear population size, trend, and survival in the Northern Continental Divide Ecosystem (NCDE) in Montana to improve the long-term survival for this threatened species. With description, DNA identification means and photos.
Pacific Island Ecosystems Research Center [New Window]
Geographical isolation of the Hawaiian Islands has resulted in the evolution of endemic species unique in the world. Research at the Center aims at preventing the further extinction of these species. Links to projects, publications and other data.
Patuxent Wildlife Research Center [New Window]
Core web page from America's first wildlife experiment station and a leading wildlife management refuge, the Patuxent Wildlife Research Center, Laurel, Maryland with links to projects, publications, library, contacts, and how to get there.
Patuxent Wildlife Research Center monitoring program [New Window]
Entry to biomonitoring projects studying the status and trends of the nation's environmental resources and programs studying amphibians and birds. Links to long-term programs, resources and references, and related links.
Patuxent Wildlife Research Center: Populations [New Window]
Descriptions of projects and resources on wildlife population ecology at the Patuxent Wildlife Research Center with links to research activities, long-term programs, and resources and references.
The whooping crane report [New Window]
Report on the captive breeding program at Patuxent Wildlife Research Center to help save endangered whooping cranes. Site links to natural history information on whooping cranes, why they are endangered, cool facts on cranes, and a photo gallery.


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